SUSTech Online Judge (OJ) System: JCoder

JCoder a scalable online judge system to evaluate code correctness across multiple programming languages including C/C++, Java, JUnit, SQL, Python, MIPS and Verilog. The system passed third-party penetration testing and is now officially used by the Computer Science Department at Southern University of Science and Technology (SUSTech) , serving over 3,500 students in 13 courses.